17684995057 has 2 divisors, whose sum is σ = 17684995058. Its totient is φ = 17684995056.

The previous prime is 17684995033. The next prime is 17684995099. The reversal of 17684995057 is 75059948671.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17069161201 + 615833856 = 130649^2 + 24816^2 .

It is an emirp because it is prime and its reverse (75059948671) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17684995057 is a prime.

It is a super-2 number, since 2×17684995057² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17684994986 and 17684995004.

It is not a weakly prime, because it can be changed into another prime (17684992057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8842497528 + 8842497529.

It is an arithmetic number, because the mean of its divisors is an integer number (8842497529).

Almost surely, 2^17684995057 is an apocalyptic number.

It is an amenable number.

17684995057 is a deficient number, since it is larger than the sum of its proper divisors (1).

17684995057 is an equidigital number, since it uses as much as digits as its factorization.

17684995057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19051200, while the sum is 61.

The spelling of 17684995057 in words is "seventeen billion, six hundred eighty-four million, nine hundred ninety-five thousand, fifty-seven".